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Flaws in Gulf rigs persist 4 years after BP spill

Updated: 
June 6, 2014 - 12:05am

NEW YORK — Flaws in safety equipment and procedures used on Gulf of Mexico rigs persist four years after 11 workers died in an explosion aboard the Deepwater Horizon that led to the largest offshore oil spill in U.S. history.

Drillers and regulators misunderstand the limits of blowout preventers, or BOPs, which are supposed to pinch pipes and prevent oil and natural gas from escaping a well in an emergency, the U.S Chemical Safety